DO

Teachers, please find something positive to say about each child when talking to the parents in the morning and especially at the end of the day.  Yes, even that little one who seems to spend more time in timeout then any other child in your class.  Try not to bombard parents with negative comments about their chid each and every day.  Parents begin to dread talking to you or even seeing their child at the end of the day.  And the child might not look forward to seeing their parents because they know they're going to be in trouble yet again.  
When I have a child who seems to have problems day in and day out, I try to find something--anything--positive I can share with their parents at the end of the day. Even a tiny improvement is worth praising--hey, it's a start, right?  And it means a lot to these children when you tell their parents--in front of the child--that they have had a much better day.
At our daycare we send home notes if a child has had a "not so good day." I always try to follow it with a good note if they've had even the tiniest improvement.  I can't tell you how many parents have told me that they put that note in their child's scrapbook or framed it because they had never received a "good" note before.  That's not right--every child deserves some positive feedback from their teachers--especially preschoolers.  So many times those same kids would end up being some of the best kids in my class.  
You really don't need to tell the parents about every single time Johnny or Susie was in timeout during the day.  I tell the parents that if I don't tell them about their child being in timeout each time it's because I feel I have resolved the problem at school and the child has corrected him/herself.  The issue happened on "my shift" and was taken care of on "my shift." I call these things "not worth writing home about."  Even those parents who say they they want to know EVERY time their child is in trouble, seem to be happy with my policy.  I've never had a parent disagree with me.  I think it's a relief for the parent because then they know they won't be getting a long list of all the times their child was in trouble.  Don't get me wrong--I do write notes home for serious problems or any ongoing issues.
As a teacher, I want parents to be excited to see their child at the end of the day and for their child to be equally happy to see their parents.  They haven't seen each other all day, so let's help them all have a fun end-of-day reunion.